Nortel Passport 4400 Series Hardware Installation page 121

Cable Diagrams
Data Terminal Ready
External Transmit Data Clock
Transmit Data Clock
Receive Data Clock
Cable Present Status
Figure A-7. Cable NTAU18AA - Passport 4430, 4450, 4455 to DCE Equipment
50-Pin Male
Clear to Send
9
Data Set Ready 1 0
Carrier Detect
11
Request to Send
12
Unassigned 1 3
37
40
16
Transmit Data
41
Receive Data
17
42
Ground 43
14
Ground
39
Receive Data B 45
Ground 48
Transmit Clock B 46
Ground 49
Receive Clock B 47
Ground 50
To Passport Data Terminal
Equipment (DTE)
Passport 4400 Hardware Installation Manual
25-Pin RS-232
Male
Clear to Send
5
Data Set Ready
6
Carrier Detect
8
Request to Send
4
11 Unassigned
20 Data Terminal Ready
24 Serial Clock Transmit External
2 Transmit Data
3 Receive Data
15 Serial Clock Transmit
17 Serial Clock Receive
7 Signal Ground
1 Frame Ground
To Data Communication
Equipment (DCE)
A-9